Schneider Electric UniflairRM 3.5-kW DX Split Air Conditioning Unit User Manual

Uniflair™ RM
3.5-kW DX Split Air Conditioning Unit
User Manual
ACRMD4KT Series, 60 Hz, ETL Certified
990-6280-001
Release Date: 12/2019
www.schneider-electric.com
Legal Information
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subsidiaries referred to in this guide are the property of Schneider Electric SE or its
subsidiaries. All other brands may be trademarks of their respective owners.
This guide and its content are protected under applicable copyright laws and furnished
for informational use only. No part of this guide may be reproduced or transmitted in
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otherwise), for any purpose, without the prior written permission of Schneider Electric.
Schneider Electric does not grant any right or license for commercial use of the guide
or its content, except for a non-exclusive and personal license to consult it on an "as is"
basis. Schneider Electric products and equipment should be installed, operated,
serviced, and maintained only by qualified personnel.
As standards, specifications, and designs change from time to time, information
contained in this guide may be subject to change without notice.
To the extent permitted by applicable law, no responsibility or liability is assumed by
Schneider Electric and its subsidiaries for any errors or omissions in the informational
content of this material or consequences arising out of or resulting from the use of the
information contained herein.
3.5-kW DX Split Air Conditioning Unit
Table of Contents
Safety .................................................................................................................5
Important Safety Instructions — SAVE THESE INSTRUCTIONS .........................5
Safety During Installation and Operation ............................................................6
Intended Use .............................................................................................8
General Information .........................................................................................9
Document Overview .........................................................................................9
Original Instructions....................................................................................9
Save These Instructions..............................................................................9
Manual Updates .........................................................................................9
Cross-Reference Symbol Used in This Manual .............................................9
Abbreviations .............................................................................................9
Equipment Disposal .......................................................................................10
General Information..................................................................................10
Please Recycle ........................................................................................10
Waste Electrical and Electronic Equipment (WEEE) Disposal ......................10
California Proposition 65—Warning Statement for California Residents..............10
Receiving and Inspecting the Unit....................................................................10
Filing a Claim ........................................................................................... 11
Storing the Unit Before Installation................................................................... 11
Unpacking the Unit ......................................................................................... 11
Moving the Unit ..............................................................................................12
Unit Overview ..................................................................................................13
Introduction ...................................................................................................13
Equipment Guidelines ....................................................................................14
Working Conditions and Environmental Limits ............................................14
Standard Features and Options.......................................................................15
Standard Features....................................................................................15
Optional Features.....................................................................................16
Technical Data .........................................................................................16
Installation Configurations .........................................................................18
Dimensions and Weights...............................................................................19
Indoor Unit.....................................................................................................19
Outdoor Units ................................................................................................19
Weight...........................................................................................................20
Service Clearance..........................................................................................20
Airflow Clearance ...........................................................................................20
Access Locations ...........................................................................................21
Component Identification ..............................................................................22
Inventory .......................................................................................................22
Stacking Kit—ACAC10048........................................................................22
External Components .....................................................................................23
Indoor Unit ...............................................................................................23
Outdoor Unit ............................................................................................24
Internal Components ......................................................................................25
990-6280-001
3
3.5-kW DX Split Air Conditioning Unit
Indoor Unit ...............................................................................................25
Outdoor Unit ............................................................................................26
Diagrams .........................................................................................................27
Wiring Diagram—ACRMD4KT-1 (Indoor Unit) ..................................................27
Wiring Diagram—ACRMD4KT-2 (Outdoor Unit)................................................28
Wiring Diagram—ACAC10047 (Optional Low Temperature Kit) .........................29
Installation .......................................................................................................30
Site Preparation .............................................................................................30
Incoming Power Supply Requirements.......................................................30
Before You Start.............................................................................................30
Positioning Units ............................................................................................31
Panel Removal ..............................................................................................32
Indoor Unit ...............................................................................................32
Outdoor Unit ............................................................................................33
Mechanical Connections.................................................................................34
Installing the Indoor Unit in the Rack ..........................................................34
Installing the Stacked Unit in the Rack........................................................35
Installing the Outdoor Unit .........................................................................36
Piping Kit Application ................................................................................37
Refrigerant Piping.....................................................................................38
Drain Connection......................................................................................43
Electrical Connections ....................................................................................46
Wire Cross-Section Ratings ......................................................................47
Connection Interface ......................................................................................48
Charging the Refrigeration System ..................................................................51
Leak Detection .........................................................................................51
Vacuum Pumping .....................................................................................52
Calculating the Refrigerant Charge ............................................................53
Charging the Refrigerant ...........................................................................54
Commissioning ...............................................................................................55
Start-Up Inspection Checklist ..........................................................................55
Electrical Inspection Checklist .........................................................................56
Mechanical Inspection Checklist......................................................................57
Operation .........................................................................................................58
Stacking Unit Application Display ....................................................................58
Using the Display ...........................................................................................59
Maintenance ....................................................................................................67
Preventive Maintenance .................................................................................67
4
990-6280-001
Safety
3.5-kW DX Split Air Conditioning Unit
Safety
Important Safety Instructions — SAVE THESE INSTRUCTIONS
Read these instructions carefully and look at the equipment to become familiar with it
before trying to install, operate, service or maintain it. The following safety messages
may appear throughout this manual or on the equipment to warn of potential hazards
or to call attention to information that clarifies or simplifies a procedure.
The addition of this symbol to a “Danger” or “Warning” safety
message indicates that an electrical hazard exists which will result
in personal injury if the instructions are not followed.
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages with this
symbol to avoid possible injury or death.
DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death
or serious injury.
Failure to follow these instructions will result in death or serious injury.
WARNING
WARNING indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.
Failure to follow these instructions can result in injury or equipment damage.
NOTICE
NOTICE is used to address practices not related to physical injury. The safety alert
symbol shall not be used with this type of safety message.
Failure to follow these instructions can result in equipment damage.
Please Note
Electrical equipment should only be installed, operated, serviced, and maintained by
qualified personnel. No responsibility is assumed by Schneider Electric for any
consequences arising out of the use of this material.
A qualified person is one who has skills and knowledge related to the construction,
installation, and operation of electrical equipment and has received safety training to
recognize and avoid the hazards involved.
990-6280-001
5
3.5-kW DX Split Air Conditioning Unit
Safety
Safety During Installation and Operation
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
•
Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices.
•
This equipment must be installed and serviced by qualified personnel only.
•
Turn off all power supplying this equipment before working on or inside the
equipment.
•
Replace all devices, doors, and covers before turning on power to this
equipment.
•
Always use a properly rated voltage sensing device to confirm power is off.
•
If the power supply cord is damaged, it must be replaced by an equivalent cord
or assembly available from the manufacturer or its service agent.
Failure to follow these instructions will result in death or serious injury.
WARNING
•
Application installation and electrical service must conform to local and national
electrical codes and regulations.
•
The equipment must be grounded.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
WARNING
HAZARD FROM MOVING PARTS
Keep hands, clothing, and jewelry away from moving parts. Check the equipment
for foreign objects before closing the doors and starting the equipment.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
WARNING
DAMAGE TO EQUIPMENT OR PERSONNEL
•
The equipment is heavy. For safety purposes, adequate personnel must be
present when moving this item.
•
The load must always be solidly anchored to the bearing element of the lifting
equipment and means of transport.
•
No one should be near the suspended load, nor in the working area of the crane,
forklift, truck, or any other lifting equipment or means of transport.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
6
990-6280-001
Safety
3.5-kW DX Split Air Conditioning Unit
WARNING
HAZARD TO EQUIPMENT OR PERSONNEL
This equipment is not to be operated or installed by persons with reduced physical,
sensory, or mental capabilities, or persons lacking experience or knowledge unless
they have been given supervision or instruction. Children are not to operate or play
on or around this equipment.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
CAUTION
HAZARD FROM UNPROTECTED OUTPUT
Apply circuit protection to all outputs.
Failure to follow these instructions can result in injury or equipment damage.
CAUTION
HAZARD TO EQUIPMENT OR PERSONNEL
Do not operate your air conditioner in a wet room such as a bathroom or laundry
room.
Failure to follow these instructions can result in injury or equipment damage.
CAUTION
BODILY INJURY OR EQUIPMENT DAMAGE
This equipment is not to be accessed by the general public.
Failure to follow these instructions can result in injury or equipment damage.
NOTICE
STATIC ELECTRICITY HAZARD
Circuit boards contained within this unit are sensitive to static electricity. Use one or
more electrostatic-discharge devices while handling the board.
Failure to follow these instructions can result in equipment damage.
NOTICE
DAMAGE FROM EXPOSURE
Leaving the equipment uncovered and exposed to possible damage from the
environment will void the factory warranty.
Failure to follow these instructions can result in equipment damage.
NOTICE
DAMAGE TO REFRIGERATION CIRCUIT
•
Make sure the compressor has been pre-heated for at least 24 hours in the
event the system is not in operation for an extended period of time.
Failure to follow these instructions can result in equipment damage.
990-6280-001
7
3.5-kW DX Split Air Conditioning Unit
Safety
NOTICE
DAMAGE TO EQUIPMENT
•
If the power supply cord is damaged, it must be replaced by the manufacturer.
•
An all-pole disconnection device that has at least 3-mm clearances in all poles
and has a leakage current that may exceed 10 mA, the residual current device
(RCD) having a rated residual operating current not exceeding 30 mA, and
disconnection must be incorporated in the fixed wiring in accordance with the
wiring rules.
•
Type and rating of fuses: glass tube 250 V, 3.15 A
Failure to follow these instructions can result in equipment damage.
Intended Use
The cooling units provide air conditioning within the limits and methods described in
this manual. This equipment must be installed and applied in accordance with the
instructions provided. No modifications may be made to the units or their parts without
explicit written consent from Schneider Electric. Any mechanical or electrical
modification voids factory warranty.
8
990-6280-001
General Information
3.5-kW DX Split Air Conditioning Unit
General Information
Document Overview
Original Instructions
These are the original instructions provided by the manufacturer.
Save These Instructions
This manual contains important instructions that must be followed during installation,
operation, and maintenance of the cooling unit.
Manual Updates
Schneider Electric™ policy is one of continuous technological innovation and the
company reserves the right to amend any data herein without prior notice. The images
shown in this manual are for descriptive purposes only and they may differ from
specific models that are selected.
NOTE: Unit images and component identification information are examples only.
The final configuration of the unit may change according to the different options.
Check for updates to this manual on the Schneider Electric Web site,
www.schneider-electric.com/support. Select the Download Documents and
Software link under the Support tab and enter the manual part number or SKU for
your equipment in the search field. See the back cover of this manual for the part
number.
Cross-Reference Symbol Used in This Manual
See another section of this document or another document for more
information on this subject.
Abbreviations
The following abbreviations and terms are used in this manual:
990-6280-001
•
CFD: Computational fluid dynamics
•
EXV: Electronic expansion valve
•
PTC: Positive Temperature Coefficient
9
3.5-kW DX Split Air Conditioning Unit
General Information
Equipment Disposal
General Information
•
This air-conditioning unit contains fluorinated greenhouse gases.
•
Installation, servicing, maintenance, and repair of this unit must be performed by
qualified personnel.
•
Un-installation and recycling of the product must be performed by qualified
personnel.
•
When the unit is checked for leaks, proper record keeping of all checks is strongly
recommended.
Please Recycle
The shipping materials are recyclable. Save them for later use, or dispose of them
appropriately.
Waste Electrical and Electronic Equipment (WEEE) Disposal
Schneider Electric products comply with international directives on the
Restriction of Hazardous Substances (RoHS) in electronic and
electrical equipment and the disposal of Waste Electrical and
Electronic Equipment (WEEE). Dispose of any waste electronic or
electrical equipment with the appropriate recycling center. Contact
Schneider Electric for assistance.
California Proposition 65—Warning Statement for California
Residents
WARNING: This product can expose you to chemicals including lead and lead
compounds, that are known to the State of California to cause cancer and birth
defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
Receiving and Inspecting the Unit
The cooling unit is packaged in a wooden crate or anchored to a pallet and covered
with transparent film.
Upon delivery, check that the unit is intact and immediately notify the carrier in writing
of any damage that can be attributed to careless or improper transportation. Check for
any damage on the area upon which the display interface is mounted.
In case of shipping damage, do not operate the cooling unit. Keep all packaging for
inspection by the shipping company and contact Schneider Electric Corporation.
10
990-6280-001
General Information
3.5-kW DX Split Air Conditioning Unit
Filing a Claim
If damage is identified on receipt of the equipment, note the damage on the bill of
lading and file a damage claim with the shipping company. Contact Schneider Electric
Worldwide Customer Support at one of the numbers listed on the Web page on the
back page of this manual for information on how to file a claim with the shipping
company. The shipping claim must be filed at the receiving end of the delivery.
NOTE: In case of shipping damage, do not operate the equipment. Keep all
packaging for inspection by the shipping company and contact Schneider Electric.
Storing the Unit Before Installation
NOTICE
DAMAGE FROM EXPOSURE
Leaving the equipment uncovered and exposed to possible damage from the
environment will void the factory warranty.
Failure to follow these instructions can result in equipment damage.
Item
Storage environment
Ambient humidity
Ambient temperature
Requirements
Indoor, clean (without dust)
15–85％RH (without condensation)
–20.0 to 52.0℃ (–4.0 to 129.2°F)
Unpacking the Unit
Move the unit near its final position before unpacking it for inspection.
The unit is packed with corrugated paper. Remove all packing materials on site.
990-6280-001
11
3.5-kW DX Split Air Conditioning Unit
General Information
Moving the Unit
WARNING
DAMAGE TO EQUIPMENT OR PERSONNEL
•
The equipment is heavy. For safety purposes, adequate personnel must be
present when moving this item.
•
The load must always be solidly anchored to the bearing element of the lifting
equipment and means of transport.
•
No one should be near the suspended load, nor in the working area of the crane,
forklift, truck, or any other lifting equipment or means of transport.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
Lifting and transporting the units must be carried out by qualified personnel as
described in this manual.
Use all relevant safety standards to prevent any possible damage to people or
objects.
Indoor Unit
The cooling unit is packaged in a carton. The recommended tools for moving and
installing the equipment include the following:
Forklift
Pallet Jack
Outdoor Unit
The condensing unit is packaged in a carton. The recommended tools for moving and
installing the equipment include the following:
Pallet Jack
Forklift
Crane
105°
12
75°
na91282-30
Keep the inclination of the outdoor unit within 75–105 degrees.
990-6280-001
Unit Overview
3.5-kW DX Split Air Conditioning Unit
Unit Overview
Introduction
This AC unit series, an air conditioning system of precision environmental control in a
server cabinet, provides precise temperature control, safety and reliability, high
energy efficiency design, and remote monitoring.
This series also features efficient refrigeration, high reliability, high sensible-heat
factor, intelligent monitoring, rapid installation, convenient maintenance, and compact
structure. R410A refrigerant is used as required internationally for environmental
protection.
Precise Temperature Control
This series of air conditioners has a temperature control within ±2.0°C (3.6°F).
Intelligent microprocessing control monitors any change in the server cabinet and
responds with control processing in advance rather than reacting to the change of the
environment at that time.
Safety and Reliability
Keep the unit running 24 hours a day to keep it reliable. The advanced
microprocessing system of the units automatically adjusts machine operation and
reduces faults. Automatic alarms and diagnostics aid in maintenance and servicing to
help protect the unit and prolong the life of the unit.
High Energy Efficiency Design
The DC brushless, axial flow, centrifugal fan features minimal vibration, low noise, and
high reliability. The high-efficiency, finned-tube heat exchanger greatly improves the
heat exchange efficiency. The loop developed and verified to a specific model ensures
each loop is uniformly distributed and the heat exchanger is fully used.
Remote Monitoring
Remote monitoring includes an RS485 interface and Modbus protocol.
•
Telemetry Function: Remotely read the return and supply air temperature,
humidity of return, and working state of the unit.
•
Remote Function: Remotely read the open and close state, high or low
temperature and return air humidity, and normal or failure fan state.
•
Temperature Control Function
Cooling Control
◦
•
•
990-6280-001
Indoor temperature controls system
Cooling Regulation Function
◦
Variable-speed compressor
◦
Cooling output range of 25–100% (16–90Hz)
Temperature
◦
Regulated temperature range of 19–30°C (66.2–86.0°F)
◦
Adjustable temperature within ±2.0°C (3.6°F)
13
3.5-kW DX Split Air Conditioning Unit
Unit Overview
Equipment Guidelines
Working Conditions and Environmental Limits
Indoor Unit
Limit Working Conditions
Power Supply
208 V~, 1 Ph, 60 Hz
Room Conditions
Temperature
16–43℃ (60.8–109.4°F)
Humidity
15％–65％RH (without condensation)
Maximum Altitude
1000 m (3281 ft), de-rated for more than 1000 m
(3281 ft)
Storage Conditions
Temperature
–20 to 52℃ (–4.0 to 129.2°F)
Outdoor Unit
Limit Working Conditions
Power Supply
208 V~, 1 Ph, 60 Hz
Ambient Conditions with Low Ambient Temperature Kit
Temperature
–35.0 to 48.0°C (–31.0 to 118.4°F)
Maximum Altitude
1000 m (3281 ft), de-rated for more than 1000 m
(3281 ft)
Ambient Conditions Without Low Ambient Temperature Kit
Temperature
–20.0 to 48.0°C (–4.0 to 118.4°F)
Maximum Altitude
1000 m (3281 ft), de-rated for more than 1000 m
(3281 ft)
Storage Conditions
Temperature
14
–20 to 52℃ (–4.0 to 129.2°F)
990-6280-001
Unit Overview
3.5-kW DX Split Air Conditioning Unit
Standard Features and Options
Standard Features
Indoor Unit
Feature
Description
Evaporator
The finned tube heat exchanger with high-efficiency internal
thread copper pipes, hydrophilic foil, CFD flow field analysis,
and optimal matching improve the heat transfer efficiency.
EXV
The EXV improves the control precision and response
speed for precision cooling while the system is stable to
save energy.
Fan
The DC fan is continuously variable in speed and can
quickly respond to heat loads. It features high airflow, high
efficiency, long service life, and low noise.
Controller
The unit controller features power recovery and fault
warning. It has a terminal block connection interface.
Filter
The aluminum air filter provides a clean air supply.
Upward Air Plenum
The plenum cascades cold air up the front of the rack. The
plenum is removable for the stacking application.
Outdoor Unit
990-6280-001
Feature
Description
Compressor
The inverter-driven compressor adjusts the refrigerating
capacity. The frequency conversion control technology of the
compressor and the air supply temperature control of the unit
enable the unit to flexibly adjust the refrigerating capacity
under different heat loads, to provide a constant supply of air
temperature, and reduce air temperature fluctuations. The
running frequency of the compressor may be minimized
under low thermal load conditions to ensure that the supply
air temperature of the unit does not drop too low, and the
compressor can be prevented from frequent start and stop to
improve the efficiency and reliability of the unit and avoid
condensation resulting from too low supply air temperature.
Fan
An axial flow, low-noise fan blade features wide voltage
range and high reliability. The fan has multi-level air flow
control, which improves the operation stability of the unit.
Condenser
Efficient finned-tube heat exchanger with hydrophilic fins
does not retain dust and is easy to clean and maintain.
15
3.5-kW DX Split Air Conditioning Unit
Unit Overview
Optional Features
Feature
Description
Tube
The copper tube includes threaded joints, bell nuts, and
insulation material for the outer package. The tube is sturdy,
does not corrode easily, and withstands high temperature and
high pressure.
Condensate
Drain Pump
The low noise DC brushless water pump has a lift that reaches 5
meters (16.4 ft).
Low Ambient
Temperature Kit
The low ambient temperature kit provides the capability to
operate in temperatures below –15°C (–5°F).
Sheathed
Heating Element
The structure is compact and the heating is uniform.
The sheathed heating element installed in the indoor unit is used
for heat compensation when the IT load is low.
Colorized
Display Interface
The display interface is not required for operation, but it enables
local control of the unit for viewing and customizing operational
setpoints and status information. The unit can start-up and
operate without the display interface by running at default
settings.
Technical Data
Indoor Unit
NOTE: Refer to Unicalc for information on capacity at different conditions.
Total Cooling Capacity
3.6 kW (12,300 BTU/hr)
Sensible Cooling Capacity*
3.25 kW (11,088 BTU/hr)
Rated Power Input
208 V~, 1 Ph, 60 Hz
Rated Air Volume
750 m3/h (441 SCFM)
Number of Fans
1
IDU Fan Input Power
0.2 kW
Size of Liquid Pipe/Air Pipe
Connection
9.52/12.7 mm (0.37/0.50 in.)
SCOP
2.8
Sound Pressure Level
74.0 dB(A)
Heater Capacity
600 W
*Data at 35°C (95°F) RAT, 23%RH, outdoor air temperature 35°C (95°F).
NOTE: Sensible cooling capacity is approximately 3.0 kW @ 737 m3/h (434
SCFM) for stacked unit. Total sensible cooling capacity for a stacked application
is 6.25 kW (21,300 BTU/hr).
16
990-6280-001
Unit Overview
3.5-kW DX Split Air Conditioning Unit
Outdoor Unit
990-6280-001
Heat Exchange
6.3 kW
Rated Air Volume
1700 m3/h (1000 SCFM)
Input Power
0.95 kW
Number of Fans
1
Number of Compressors
1
Sound Pressure Level
57.8 dB(A)
17
3.5-kW DX Split Air Conditioning Unit
Unit Overview
Refrigerant
Refrigerant Type
R410A
Refrigerant Charge
1.3 kg (45.9 oz)
CO2 Equivalent
2.714 tonnes (5983.0 lb)
GWP
2088
Installation Configurations
na6280-48a
CONDENSING (OUTDOOR) UNIT INSTALLED OUTSIDE
CONDENSING (OUTDOOR) UNIT
INSTALLED NEAR THE RACK*
CONDENSING (OUTDOOR) UNIT
INSTALLED ON TOP OF THE RACK*
NOTE: *Installing the condensing unit outside is the typical room neutral
installation application. Consult with Schneider Electric for use in these custom
installation configurations
18
990-6280-001
Dimensions and Weights
3.5-kW DX Split Air Conditioning Unit
Dimensions and Weights
Indoor Unit
9.6)
752 (2
218
(8.6)
484 (19.1)
na6280-01a
FRONT OF UNIT
NOTE: Display interface is optional.
Outdoor Units
856
(33.7
)
1.7)
296 (1
359 (14.1)
990-6280-001
na91282-31a
617
(24.3)
19
3.5-kW DX Split Air Conditioning Unit
Dimensions and Weights
Weight
Unit
Operating Weight – kg (lb)
Indoor unit
26 kg (57.3 lb)
Outdoor unit
48 kg (105.8 lb)
Service Clearance
m
600 m
)
in.)
na91282-33a
m (24
600 m
(24 in.
Airflow Clearance
≥0.5 m
(≥1.5 ft)
≥0.5 m
(≥1.5 ft)
≥2 m
(≥6.5 ft)
na91282-34a
≥0.5 m
(≥1.5 ft)
20
990-6280-001
Dimensions and Weights
3.5-kW DX Split Air Conditioning Unit
Access Locations
Indoor Unit
68 (2.7)
121 (4.8)
40 (1.6)
na91282-35a
15 (0.6)
175 (6.9)
63 (2.5)
Item
Description
Suction line valve
Liquid line valve
Condensate drain line
990-6280-001
21
3.5-kW DX Split Air Conditioning Unit
Component Identification
Component Identification
na6280-02a
Inventory
Item
Description
Quantity
Indoor unit
1
Outdoor unit
1
Mounting bracket
2
M4x12 screw
2
Condensate drain hose
1
Hose clamp
3
Copper condensate drain adapter
1
na6280-11a
Stacking Kit—ACAC10048
Item
22
Description
Quantity
Grille
1
Drain connection copper pipe
1
Hose clamp
4
Communication wire (A6, B6) connection between
units
1
Stacking application wire (D1, D2)
1
990-6280-001
Component Identification
3.5-kW DX Split Air Conditioning Unit
External Components
na6280-03a
Indoor Unit
Item
990-6280-001
Description
Mounting flange
Grille
Suction line valve
Liquid line valve
Item
Description
Mounting bracket (field installed)
Condensate drain line
Handle
Display interface (optional)
23
3.5-kW DX Split Air Conditioning Unit
Component Identification
na91282-37a
Outdoor Unit
Item
Description
Electrical panel access cover
Suction line valve
Liquid line valve
Mounting support
Fan protection grille
24
990-6280-001
Component Identification
3.5-kW DX Split Air Conditioning Unit
Internal Components
naX628004a
Indoor Unit
Item
990-6280-001
Description
Heater temperature protector
Axial fan
Evaporative coil
Electronic expansion valve (EXV)
Connection access box
Suction line temperature sensor
Item
Description
Condensate drain pan
Electric heater
Power supply unit
Temperature and humidity sensor
Isolated data repeater
Terminal board
25
3.5-kW DX Split Air Conditioning Unit
Component Identification
na6280-05a
Outdoor Unit
Item
26
Description
Accumulator
Filter
Suction temperature sensor
Service port
High pressure switch
Electrical panel
Item
Description
High pressure sensor
Discharge temperature sensor
Low pressure sensor
Compressor
Electronic expansion valve (EXV)
990-6280-001
Diagrams
3.5-kW DX Split Air Conditioning Unit
Diagrams
Wiring Diagram—ACRMD4KT-1 (Indoor Unit)
MODEL: ACRMD4KT-1
TEMPERATURE AND HUMIDITY SENSOR
RH
-
+
-
TH4 COIL OUTLET TEMPERATURE SENSOR
RS485
41
TH3 COIL INLET TEMPERATURE SENSOR
PE
TH1 AIR OUTLET TEMPERATURE SENSOR
P
N
LINE
4
DC-
E
AI1
29
J14
AI4
AO1 GND AO2 GND
COM
J15
J11
J13 J12
1
A5
6
5
FIRE ALARM
J10 J9 J8 J7 J6 J5 J4
N
MAGNETIC
RING
10
9
DI2
26
M
DI4
25
B5
~
DO3
K1 30
EK251
B6
J2
1
2
3
1
2
3
B3
J1
DO6
DC POWER
26
SV
A5
A5
A6
PE
VALVE
DC48V+
1
2
3
B5
J3
DO4
DO5
N
L
4 T/R-
DO2
CONDENSATION PUMP
2
GND
LEAKAGE DETECTION
14
13
GENERAL ALARM
L1
8
7
DI3
DO1
N1
1
vcc
PUMP FEEDBACK
L
SERIOUS ALARM
11
A3
12
B3
COM
DI1
LOAD
3
2
B5
SIG4 SIG 3 SIG 2 SIG 1 GND +5V
FILTER
P
60
AI3
6
42
AI2
T/R-
MAGNETIC
RING
T/R+ 5
N
3 T/R+
L
INDOOR & OUTDOOR UNIT
COMMUNICATION
T
+
RS485
ISOLATOR
208V~60Hz
B
A
A3
27
V-
DO7
DC48V-
GND
EXV1
28
ACN
ACL
+24V
+24V
V+
GND
+12V
EARTH
A6
B6
COM
DC-
N1
L1
USER DISPLAY
EXV
60
-
M
_
4
HEATER
MOTOR
NOTICE 1
TERMIAL BLOCK DESCRIPTION:
52
FUSE
50
K1
53
THERMOSTAT
51
MAGNETIC
RING
1
2
RS485+ RS485-
3
4
RS485+ RS485-
HOST COMPUTER COMMUNICATION
11
12
13
14
A3
B3
D1
D2
5
6
F1
F2
FIRE ALARM
15
16
7
8
9
W1
W2
P1
LEAKAGE DETECTION PUMP
17
18
10
P2
FEEDBACK
19
20
25
26
L3
N
CONDENSATE PUMP
27
28
29
PE
SV
L1
VALVE KP/CH
LOW TEMP KIT
30
31
32
NOTICE 2
1.
FIELD WIRING
FACTORY WIRING
SPARE
2.SHORT FIRE ALARM /REMOTE SWITCH ON FACTORY
33
3.SHORT CONNECTION :J6,J9
4.J1,J2,J3 JUMPER: "1-2"SHORT
INDOOR & OUTDOOR UNIT
COMMUNICATION
990-6280-001
OPTIONAL
24VDC
+ -
ELECTRONIC EXPANSION VALVE
34
PE
L
N
MAIN POWER SUPPLY
na6280-46a
DC+
+
27
3.5-kW DX Split Air Conditioning Unit
Diagrams
Wiring Diagram—ACRMD4KT-2 (Outdoor Unit)
MODEL:ACRMD4KT-2
ELECTRONIC
EXPANSION VALVE
208V~/60Hz
EXV
CRANKCASE HEATER
ELECTRIC REACTOR
MAGNETIC
RING
FAN MOTOR
BLUE
YELLOW
WHITE
BLACK
RED
M
MAGNETIC
RING
TB
L
N
HIGH PRESSURE SWITCH
HP
MP
K1
HIGH PRESSURE SWITCH
FAN PLATE
K1
RELAY
L1
LX2
FAN2
LX1
OUT6
N6
N1
MAGNETIC
RING
OUT5 OUT4 OUT3 N3
AC_L
AC_N
SW1
FU1
PE
T30AH250V
EXV
CN5
W
CN6
V
28
TS2
TS3
TS4
TH8
1 2 3
SW1.2
ON
OFF
A3 B3
1 2 3
SW SETTING :
SW1.1
MAGNETIC
RING
TS5
TO INDOOR UNITS
FACTORY WIRING
FIELD WIRING
na6280-45a
TH7
LOW PRESSURE SENSOR
TH6
ENVIRONMENTAL TEMPERATURE SENSOR TH8
TH5
CONDENSED TEMPERATURE SENSOR TH5
TH4
SUCTION TEMPERATURE SENSOR 2 TH4
TH3
SUCTION TEMPERATURE SENSOR 1 TH3
COMPRESSOR
TH2
DISCHARGE TEMPERATURE SENSOR 2 TH2
U
M
TH1
DISCHARGE TEMPERATURE SENSOR 1 TH1
V
RED
BLUE
YELLOW
W
JTAG
HIGH PRESSURE SENSOR
TS1
U
MAGNETIC
RING
990-6280-001
Diagrams
3.5-kW DX Split Air Conditioning Unit
Wiring Diagram—ACAC10047 (Optional Low Temperature Kit)
CONNECT TO THE INDOOR UNIT
NOTE:
TB TERMINAL BLOCK
SP PRESSURE SWITCH
SV VALVE
DTP THERMOSTAT
SP SETTING
TB
L1
N
SV
SETTING
22bar
DIFF.
6bar
PE
FACTORY WIRING
FIELD WIRING
P
2
DTP
990-6280-001
SV
na6280-47a
SP
HEATER
1
29
3.5-kW DX Split Air Conditioning Unit
Installation
Installation
Site Preparation
Follow these guidelines to prepare the site for installation.
•
Moisture proof and insulate the room to ensure the normal functioning of the
environmental control system inside the room.
•
Use polyethylene film for the moisture barrier on the ceilings and walls.
•
Use moisture-proof paints on the concrete walls and floor.
•
Minimize the entry of the outdoor air into the IT space as outdoor air may increase
heating, cooling, and humidification and dehumidification loads of the system.
Maintain intake of outdoor air below 5% of the circulating air.
•
Fully enclose all doors and windows with minimized gaps.
Incoming Power Supply Requirements
WARNING
•
Application installation and electrical service must conform to local and national
electrical codes and regulations.
•
The equipment must be grounded.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
•
The main power requirement is 208 V/60 Hz.
•
Ensure the electrical connection of the unit allows for the total load of the unit and
its optional components. The difference between external static pressure of the
unit and that of a standard unit may lead to changes in its input power and
current. For the total input power and the total current, see the nameplate.
•
The incoming power wire must have a circuit breaker of enough capacity with a
contact opening distance of at least 3 mm (0.11 in.).
•
Provide each unit with an independent power supply with power supply cut-off
and over-current protection devices.
•
Before wiring, ensure the power supply conforms to the specified value on the
nameplate.
•
Keep the wires away from the cooling line and the moving parts of the
compressor, fan, and motor.
Before You Start
The outdoor unit has been charged with refrigerant in the factory, and the indoor unit
has been filled with a nitrogen holding charge. If you need to check the gas, do the
following:
1. Open the shutoff valve.
2. Press the needle valve side of the service valve and check for gas ejection.
3. Connect a pressure gauge to get an accurate reading.
30
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
Positioning Units
Outdoor Unit
CAUTION
HAZARD FROM SHARP EDGES
Many metal parts have sharp edges. Be careful and wear protective gloves and
clothing when working around and inside the equipment.
Failure to follow these instructions can result in injury or equipment damage.
CAUTION
DAMAGE TO EQUIPMENT OR PERSONNEL
Use concrete or a supporting frame to build a base for the unit. Allow for the floor
strength, drainage treatment, duct, and wiring. Insufficient strength may cause the
unit to drop resulting in injury or equipment damage.
Failure to follow these instructions can result in injury or equipment damage.
NOTICE
EQUIPMENT DAMAGE RISK
Install the unit in an area that is protected from adverse conditions such as an oil
source (including engine oil), salt (in a marine region), and sulfide gases (near a hot
spring or refinery).
Failure to follow these instructions can result in equipment damage.
Select a location for the installation that adheres to the following guidelines:
•
Does not take in hot air from the unit or another unit.
•
Allows enough clearance space for maintenance.
•
Has no obstacles in the air exhaust and draft ducts of the outdoor unit to stop
airflow.
•
Provides good ventilation to help the unit exchange heat.
•
Has sufficient strength to bear the weight of the unit and its vibration during
operation.
•
Does not have dirt, oil, salt, or sulfide gases.
•
Is able to drain rainwater and defrost water.
•
Is not susceptible to flammable gas. If any flammable gas leaks and accumulates
around the unit, an explosion may occur.
•
Is not subject to direct blow of a strong breeze or typhoon. Install rainproof,
snowproof, and sunproof equipment if possible.
The floor and wall may cause vibration and noises depending on the installation
conditions. Adopt anti-vibration measures such as anti-vibration pad or bumper
bracket.
990-6280-001
31
3.5-kW DX Split Air Conditioning Unit
Installation
Panel Removal
Indoor Unit
Electrical Box Access
na91282-60a
1. Remove the filter.
na91282-61a
2. Remove the electrical panel screws.
na91282-38a
3. Slide the electrical box out of the unit.
32
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
Outdoor Unit
na91282-62a
Electrical Panel Access
na91282-63a
External Panel
990-6280-001
33
3.5-kW DX Split Air Conditioning Unit
Installation
Mechanical Connections
Installing the Indoor Unit in the Rack
The air conditioner is a cabinet refrigeration product that is installed in the standard
cabinet of a machine room.
NOTE: Some components not shown for easier viewing.
1. Install the optional rail kit in the cabinet where the unit is to be installed.
See the installation instructions in the rail kit.
na6280-06a
2. Slide the cooling unit (for a single unit application or the bottom unit for the
stacking application) into the rack on the rails.
3. Attach the front mounting flanges to the vertical mounting rails in the rack with the
cage nuts and washers provided with the rack.
4. Attach the rear of the unit to the vertical mounting rails with the supplied mounting
brackets and the cage nuts and washers provided with the rack.
NOTE: These may not be necessary to support the unit if the rail kit is
installed.
34
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
Installing the Stacked Unit in the Rack
A second unit can be stacked on top of the first rackmount unit to increase the cooling
capacity within the rack.
NOTE: Some components not shown for easier viewing.
na6280-07a
1. Remove the front plenum and display from the second unit.
na6280-08a
2. Attach the front grille from the stacking kit ACAC10048 to the front of the unit.
3. Install the optional rail kit in the cabinet where the unit is to be installed.
See the installation instructions in the rail kit.
na6280-09a
4. Slide the cooling unit into the rack on the rails.
5. Attach the front mounting flanges to the vertical mounting rails in the rack with the
cage nuts and washers provided with the rack.
6. Attach the rear of the unit to the vertical mounting rails with the supplied mounting
brackets and the cage nuts and washers provided with the rack.
NOTE: These may not be necessary to support the unit if the rail kit is
installed.
990-6280-001
35
3.5-kW DX Split Air Conditioning Unit
Installation
Installing the Outdoor Unit
CAUTION
SHARP EDGES
Do not touch the fins of the heat exchanger with bare hands.
Failure to follow these instructions can result in injury or equipment damage.
When installing the outdoor unit, follow these guidelines:
•
Concrete or a supporting frame should be used to build a base for the unit. When
building the base, allow for the floor strength, drainage treatment (drainage water
will outflow from the unit when it is in operation), and duct and wiring. Insufficient
strength may cause the unit to fall.
•
The outdoor unit should be attached to the frame with M10 bolts at each corner of
the mounting base of the outdoor unit.
•
Vibrations and noise from the unit may be transmitted to the structure when it is in
operation. Use anti-vibration pads or a similar measure to prevent transmission of
vibrations and noise.
na6186-07a
M10 FOUNDATION BOLT
36
15-MM-THICK (0.06-IN.-THICK)
VIBRATION PAD
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
Piping Kit Application
Three piping kits are available as options for use with a single cooling unit installation:
•
ACAC10042: Top piping
•
ACAC10043: Bottom piping under the raised floor
•
ACAC10044: Bottom piping under the rack
Use piping kit ACAC10042 with the top unit in a stacked application, and use either
ACAC10043 or ACAC10044 with the bottom unit.
ACAC10043
ACAC10044
ACAC10042
ACAC10043
ACAC10042
ACAC10044
na6280-10a
ACAC10042
990-6280-001
37
3.5-kW DX Split Air Conditioning Unit
Installation
Refrigerant Piping
Piping Connection
The minimum equivalent piping length between the indoor and outdoor units is 5 m
(16.4 ft). The maximum equivalent piping length between the indoor and outdoor units
is 20 m (65.6 ft). The maximum vertical difference for the outdoor unit above or below
the indoor unit is 5 m (16.4 ft). The table below outlines pipe sizes for field piping.
Tube
Size
Liquid line
Ø9.52 mm (3/8 in.)
Gas line
Ø12.7 mm (1/2 in.)
Refrigerant R410A piping (minimum
thickness)
0.8 mm (0.03 in.)
The minimum thickness of the piping specified in the instructions is based on a pipe of
copper and copper alloys in accordance with ASTM B280. The thickness and material
of pipes used must rated to withstand a pressure of 4.8 MPa (700 psi) in accordance
with applicable laws.
If the unit is in an environment of severe corrosion, increase the thickness of the pipe
by at least 0.2 mm (0.008 in.).
If the piping has a reduced thickness from bending and tensioning, increase its wall
thickness accordingly.
na7154a
DIAMETER
Refer to the sizes in the table for processing the bell mouth of copper piping.
OD
38
OD Size
Metric
British
R410A
Ø6.35 mm
1/4 in.
9.1 mm (0.36 in.)
Ø9.52 mm
3/8 in.
13.2 mm (0.52 in.)
Ø12.70 mm
1/2 in.
16.6 mm (0.65 in.)
Ø15.88 mm
5/8 in.
19.7 mm (0.78 in.)
Ø19.05 mm
3/4 in.
24.0 mm (0.94 in.)
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
na7255a
See the table for the corresponding flare nut specifications.
DIAMETER
OD
990-6280-001
OD Size
Metric
British
Ø 6.35 mm
1/4 in.
17.0
Ø 9.52 mm
3/8 in.
22.0
Ø 12.70 mm
1/2 in.
24.0
Ø 15.88 mm
5/8 in.
27.0
Ø 19.05 mm
3/4 in.
36.0
39
3.5-kW DX Split Air Conditioning Unit
Installation
Copper Pipe Connection
1. Remove and keep the flare nuts and remove and discard the copper plugs from
the liquid line and suction line connections.
na91282-66a
COPPER
PLUG
FLARE
NUT
FLARE
NUT
COPPER
PLUG
2. Connect the pipes from the selected pipe kit (ACAC10042, ACAC10043, or
ACAC10044) to the liquid and suction lines.
na91282-67a
NOTE: Make sure the piping does not inhibit removal of the electrical box.
3. Use a flaring tool to connect the customer piping (field supplied) to the flare nut.
NOTE: Make sure the flare nut is on the piping before using the flaring tool on
the customer piping.
CUSTOMER PIPING
(FIELD SUPPLIED)
40
na91282-68a
FLARE NUT
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
4. Route the customer piping through the cabinet and connect the flare nuts to the
customer-piping side of the pipe kit.
NOTE: Pipe kit ACAC10044 is shown.
na91282-69a
PIPING
KIT
FLARE NUT
FLARE NUT
CUSTOMER PIPING
(FIELD SUPPLIED)
5. Remove and keep the flare nuts and remove and discard the copper plugs from
the liquid line and suction line connections.
na91282-70a
COPPER
PLUG
FLARE
NUT
FLARE
NUT
COPPER
PLUG
6. Use a flaring tool to connect the customer piping (field supplied) to the flare nut.
NOTE: Make sure the flare nut is on the piping before using the flaring tool on
the customer piping.
CUSTOMER PIPING
(FIELD SUPPLIED)
990-6280-001
na91282-68a
FLARE NUT
41
3.5-kW DX Split Air Conditioning Unit
Installation
7. Connect the flare nuts to the suction and liquid lines of the outdoor unit.
CUSTOMER PIPING
(FIELD SUPPLIED)
na91282-71a
FLARE
NUT
FLARE
NUT
CUSTOMER PIPING
(FIELD SUPPLIED)
OD
Tightening Torque
Tightening Angle
Ø6.35 mm
(1/4 in.)
14–18 N·m
(10.33–13.28 ft-lb)
60°–90°
Ø9.52 mm
(3/8 in.)
35–42 N·m
(25.81–30.98 ft-lb)
60°–90°
Ø12.7 mm
(1/2 in.)
50–57.5 N·m
(36.88–42.41 ft-lb)
30°–60°
Ø15.88 mm
(5/8 in.)
75–80 N·m
(55.32–59.00 ft-lb)
30°–60°
Ø19.05 mm
(3/4 in.)
100–140 N·m
(73.76–103.26 ft-lb)
20°–35°
Brazing Copper Pipes
1. Use a neutral flame to braze and control the ratio of oxygen to acetylene
(O2:C2H2=1.0–1.2). Heat the base metal 20–25 mm (0.78–0.98 in.) from the
flame core given that the highest temperature is 2–3 mm (0.7–0.11 in.) from the
flame core (for reference only).
2. Fill the copper pipe with nitrogen to eliminate air. An oxide film may lead to
blockage of the expansion valve, filter, or other system components.
3. Maintain the flow of nitrogen at 10–20 l (2.64–5.28 gal) per minute with a
pressure regulating valve.
4. Fill with nitrogen until the pipe is completely cooled down.
Insulating Refrigerant Pipes
Insulate the refrigerant pipes with closed cell foam insulation of sufficient thickness to
cover the liquid pipe and the suction line. Improper insulation materials or installation
methods may cause condensation to drip from the refrigerant pipes.
42
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
Drain Connection
Standard Single Unit
1. Attach the condensate drain hose to the drain connection of the unit with the hose
clamp and route it out of the unit.
NOTE: The condensate drain hose can be cut to the desired length for the
application.
na6280-12a
NOTE: Make sure the condensate drain hose is horizontal or angled slightly
downward.
na6280-13a
2. Connect the drain hose to the copper condensate drain adapter with a hose
clamp.
3. Fill the condensate drain adapter with 50 ml (1.7 oz) of water and make sure the
adapter is at least 50 mm (2 in.) below the unit drain connection.
4. Connect the drain hose to the outlet of the condensate drain adapter and route
the hose to a drain or connect it to the condensate drain pump.
See the condensate drain pump Installation Sheet.
990-6280-001
43
3.5-kW DX Split Air Conditioning Unit
Installation
Stacking Units
1. Cut two small sections about 50 mm (2 in.) in length from the condensate drain
hose included with the unit.
na6280-14a
2. Connect the condensate drain connections with the small pieces of cut hose, the
drain connection pipe, and hose clamps.
Item
Description
Unit condensate drain connections
Hose clamps
Hose pieces
Drain connection copper pipe
3. Attach the condensate drain hose to the drain connection pipe with a hose clamp.
NOTE: The condensate drain hose can be cut to the desired length for the
application.
na6280-15a
NOTE: Make sure the condensate drain hose is horizontal or angled slightly
downward.
44
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
na6280-16a
4. Route the drain hose out of the unit and connect it to the copper condensate drain
adapter with a hose clamp.
5. Fill the condensate drain adapter with 50 ml (1.7 oz) of water and make sure the
adapter is at least 50 mm (2 in.) below the unit drain connection.
6. Connect the drain hose to the outlet of the condensate drain adapter and route
the hose to a drain or connect it to the condensate drain pump.
See the condensate drain pump Installation Sheet.
990-6280-001
45
3.5-kW DX Split Air Conditioning Unit
Installation
Electrical Connections
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
•
Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices.
•
This equipment must be installed and serviced by qualified and trained
personnel only.
•
Turn off all power supplying this equipment before working on or inside the
equipment.
•
Replace all devices, doors, and covers before turning on power to this
equipment.
Failure to follow these instructions will result in death or serious injury.
DANGER
ELECTRICAL HAZARD
Overcurrent protection for all incoming power feeds must be provided by the
customer. See unit nameplate for equipment ratings.
Failure to follow these instructions will result in death or serious injury.
WARNING
•
Application installation and electrical service must conform to local and national
electrical codes and regulations.
•
The equipment must be grounded.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
WARNING
ELECTRICAL FIRE HAZARD
Use copper conductor wiring only.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
The following electrical connections are required in the field:
•
Communication lines between the indoor and outdoor units (PLTC 2 x 0.5 mm2
cable)
NOTE: Communication line A and B need to be distinguished when
connecting.
•
Remote monitoring line of the unit
Before connecting the circuit, determine the input power voltage with a voltmeter, and
turn the power off. Use PVC insulated copper wires or rubber insulated copper wires
for the connecting wires of the indoor and outdoor units. The cross-sectional area
must meet the maximum requirements for load of the unit and its components. Secure
all wiring: Connecting wires of the indoor and outdoor units must be fixed on clips.
46
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
Wire Cross-Section Ratings
Wire Area
Maximum Current
1.0 mm2
8A
1.5 mm2
11 A
mm2
15 A
2.5
4 mm2
20 A
6 mm2
25 A
mm2
35 A
10
Do not connect the same power terminal with two wires of different diameters.
When connecting to the terminal block, use a needle-shaped terminal with an
insulation sleeve. Ensure the terminal connection to the wires is acceptable.
b
c
d
na7256a
a
Item
990-6280-001
Description
a
Wires (cross copper wires of over 0.5 mm2)
b
Insulating material
c
Shielding layer (requires more than 95% shielding effectiveness)
d
Outer layer protection (PVC)
47
3.5-kW DX Split Air Conditioning Unit
Installation
Connection Interface
Connection interfaces include the total power input interface and the remote
communication interface of the unit.
Indoor Unit
L
N
PE
na6280-17a
A3
B3
D1
D2
A6
B6
L3
N
SV
L1
PE
RS485+
RS485RS485+
RS485F1
F2
W1
W2
P1
P2
See the installation sheets provided with the accessories for more
information.
Item
Description
Controller communication connections
(RS485+, RS485–, RS485+, RS485–)
Fire/smoke alarm connection (F1, F2)
Leak sensor connection (W1, W2)
Condensate drain pump
communication connection (P1, P2)
Condensate drain pump power supply
connection (L3, N)
Low temperature kit connection
• Solenoid valve (SV)
•
Item
Description
Ground (GND)
Power supply connection (L, N, GND)
Communication connection to the
outdoor unit (A3, B3)
Stacking unit address setting
(D1, D2)*
Standard unit and stacking unit
connection (A6,B6)**
High pressure control and heater
(L1)
•
Neutral (N) connection shared
with condensate drain pump
*The D1, D2 connections from the stacked unit must be connected with the wiring provided in the stacking kit.
(ACAC10048).
** To use the display interface with both units in a stacking application, connect the A6, B6 terminals of the
standard unit to the A6, B6 terminals of the stacked unit with the wiring provided in the stacking kit (ACAC10048).
48
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
na91282-73a
1. Remove the cover from the connections box.
na6280-18a
2. Remove the communication position connectors from the electrical box to make
connections easier.
3. Route the power connections through the cable strain reliefs and make the
connections in the unit.
4. Route the communication connections through the cable strain reliefs and make
the connections to the position connectors.
5. Replace the communication position connectors.
6. Replace the cover.
990-6280-001
49
3.5-kW DX Split Air Conditioning Unit
Installation
na91282-75a
Outdoor Unit
Item
Description
Power supply connection (L, N, GND)
Communication connection to indoor unit (Ain, Bin)
1. Remove the electrical panel cover.
See Panel Removal, page 32.
2. Route cables through the cable strain reliefs and make the unit connections.
3. Replace the electrical panel cover.
50
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
Charging the Refrigeration System
NOTICE
DAMAGE TO EQUIPMENT
Follow the procedures and tables outlined in this manual to charge the refrigerant if
the piping exceeds the standard length.
Failure to follow these instructions can result in equipment damage.
Indoor and outdoor units are all provided with service valves. Connect the service
valves to pipes for immediate system leak detection, vacuum pumping, and refrigerant
filling procedures.
NOTE: Indoor units are not pre-charged with refrigerant in the factory.
Leak Detection
Method One
1. Fill the service valve with nitrogen to increase pressure to 2.8 MPa (406 psi) and
4.15 MPa (601 psi) for refrigerant R410A.
2. Apply soapy water at the connecting joints or welding joints of pipes for leak
detection.
3. Repair leak sources and maintain the pressure for more than six hours to ensure
that the pressure is not decreased.
4. The low side of the compound gauge cannot be connected to the system.
Method Two
1. Fill with the refrigerant and stop when the pressure gauge indicates 0.3 MPa (43
psi).
2. Fill with nitrogen and stop when the pressure gauge indicates 2.8 MPa (406 psi)
and 4.15 MPa (601 psi) for refrigerant R410A.
3. Use an HFC electronic leak detector to detect the leak. Use the bubble gas leak
testing method.
990-6280-001
51
3.5-kW DX Split Air Conditioning Unit
Installation
Vacuum Pumping
1. Exhaust the high pressure nitrogen in the system.
2. Connect the three flexible pipes of the compound pressure gauge to the
corresponding joints of the service valve and the vacuum pump.
3. Start the vacuum pump and maintain the pressure inside the system below 650
Pa (0.09 psi). Do not start the unit until the pipeline for vacuum pumping is turned
off.
TO OUTDOOR UNIT
GAS PIPE
LIQUID PIPE
TO OUTDOOR UNIT
LOW
HIGH
na91282-40a
INDOOR UNIT
Item
Description
Ball valve
Service port
Compound pressure gauge
Check valve
Vacuum pump
52
990-6280-001
Installation
3.5-kW DX Split Air Conditioning Unit
Calculating the Refrigerant Charge
When leaving the factory, the outdoor units that have been filled with refrigerant in the
factory have enough refrigerant required to cover 5 m (49 ft) of pipe. If the actual
length of the pipe exceeds 5 m (49 ft), add more refrigerant for the additional length.
Liquid Pipe
Specifications – mm
R410A Refrigerant – g/m
(lb/ft)
Actual Pipe Length
Ø22.23
350 (0.24)
L1
Ø19.05
260 (0.17)
L2
Ø15.88
180 (0.12)
L3
Ø12.7
120 (0.08)
L4
Ø9.52
70 (0.05)
L5
Ø6.35
45 (0.03)
L6
The refrigerant to be added is calculated on the basis of the length and thickness of
the lengthened pipe. The formula is: refrigerant to be added (kg) = 0.35 x L1 + 0.26 x
L2 + 0.18 x L3 + 0.12 x L4 + 0.07 x L5 + 0.045 x L6.
If the calculated result is less than 0.1 kg, round it to 0.1 kg. For example, if the
calculated result is 28.62 kg, then add 28.7 kg as the charge amount.
990-6280-001
53
3.5-kW DX Split Air Conditioning Unit
Installation
Charging the Refrigerant
1. Open the gas and liquid valves of the indoor and outdoor units.
2. If the filling tank for R410A does not have siphons, invert it.
3. Measure the filling amount with an electronic scale to prevent excessive filling.
Fill the gas pipe and the liquid pipe with liquid refrigerant at the same time. If the
pressure is too large to fill the refrigerant, fill the refrigerant with a compressor
during the test run.
TO OUTDOOR UNIT
GAS PIPE
TO OUTDOOR
UNIT
LOW
LIQUID PIPE
HIGH
SCALE
na91282-41a
INDOOR UNIT
SCALE
Item
Description
Cylinder with siphon
Ball valve
Service port
Compound pressure gauge
Refrigerant tank
54
990-6280-001
Commissioning
3.5-kW DX Split Air Conditioning Unit
Commissioning
After installation, verify that all components are working properly and the equipment is
ready to begin operation.
Start-Up Inspection Checklist
The start-up inspection ensures that the equipment is operating properly after the
initial start-up. This inspection verifies that all modes of operation are working
correctly and the cooling unit is ready for normal operation.
Ensure that
The power core model of the outdoor and indoor units is correct.
The fan and motor of the indoor unit are working normally.
The fan and motor of the outdoor unit are working normally.
Communication lines are correctly connected.
The condensate pipe of the indoor unit is unblocked and the water seal
installation is correct.
The equipment is properly grounded and insulation is correct (10
megohm).
The indoor and outdoor units have power supply in line with the nameplate,
and the input voltage is not too high or too low.
The system has no leaks.
The main menu shows no fault after the unit is powered on.
Parameters on the manual operator are correctly set.
After the unit is started, the safety device does not trip.
The air-out temperature of the unit is within its normal range.
The air-out or air-return speed of the unit is within its normal range.
The unit has no abnormal sound and its components have no abnormal
vibration.
The unit can operate normally by setting the switch mode and its
components work accordingly.
After a Long Shutdown
If the outdoor unit is restarted after a long shutdown, energize it for at least 8 hours
before restarting the compressor.
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55
3.5-kW DX Split Air Conditioning Unit
Commissioning
Electrical Inspection Checklist
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
•
Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices.
•
This equipment must be installed and serviced by qualified and trained
personnel only.
•
Turn off all power supplying this equipment before working on or inside the
equipment.
•
Replace all devices, doors, and covers before turning on power to this
equipment.
Failure to follow these instructions will result in death or serious injury.
WARNING
•
Application installation and electrical service must conform to local and national
electrical codes and regulations.
•
The equipment must be grounded.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
The electrical inspection verifies that all electrical connections are secure and correct
and that the equipment is properly grounded.
Ensure that
The power core model of the outdoor and indoor units is proper.
Incoming voltages match the phase and voltage rating on the nameplate.
Electrical wiring complies with local and national codes and regulations.
The equipment is properly grounded and insulation is correct (10
megohm).
Electrical connections are tight, including contactors, terminal blocks,
controllers, switches, relays, auxiliary devices, and field connections.
Circuit breakers are correct and securely attached to the DIN rail.
Communication lines are correctly connected.
56
990-6280-001
Commissioning
3.5-kW DX Split Air Conditioning Unit
Mechanical Inspection Checklist
CAUTION
HAZARD TO EQUIPMENT OR PERSONNEL
•
The equipment is shipped from the factory with a nitrogen holding charge.
Remove the nitrogen holding charge using the service ports located on the
internal refrigerant piping.
•
Improperly installed piping may result in improper operation and possible
damage to the cooling unit or surrounding equipment.
Failure to follow these instructions can result in injury or equipment damage.
The mechanical inspection verifies that all mechanical components and connections
are secure and tight and ready for start-up.
Ensure that
Clearance space around the unit is appropriate.
The fan and motor of the indoor unit are working normally.
The fan and motor of the outdoor unit are working normally.
The units are placed upright and fasteners used for installation are locked.
Pipes connecting the indoor and outdoor units are installed.
The drain pipe of the indoor unit is connected.
The condensate pipe of the indoor unit is unblocked and the water seal
installation is correct.
All copper pipe joints are fastened.
The system has no leaks.
Fasteners for transport are removed.
Transport materials, structure materials, and tools inside or around the
equipment are removed.
990-6280-001
57
3.5-kW DX Split Air Conditioning Unit
Operation
Operation
Stacking Unit Application Display
The display interface in a stacking application will be different from the standard unit.
1. The D1, D2 connections from the stacked unit must be connected to the D1, D2
connections in the standard unit with the wiring provided in the stacking kit.
2. The display firmware must updated to the stacking version.
3. Pressing the symbol below the date and time on the Main Interface screen will
switch between the standard unit and stacked unit.
2019-03-20
16:11
0.0°C
Air return temperature
0.0°C
Air return humidity
0.0°C
Operating mode
Cooling
ON/OFF
Input/
Output
Setpoint
User
Mainten
ance
1#
Manufac
turer
na6280-19b
Air outlet temperature
#1 is the standard unit; #2 is the stacked unit.
2019-03-20
16:11
1#
ON
OFF
V1
Presss the appropriate button to turn the
unit on or off.
na6280-23b
U:01
IMPORTANT: With the stacking application, the fan speed cannot be higher than
8 V. This setting can be found in the Main > Manufacturer > Parameters menu.
58
990-6280-001
Operation
3.5-kW DX Split Air Conditioning Unit
Using the Display
Main Interface
Description
Screen
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16:11
Air outlet temperature
0.0°C
ON/OFF
Air return temperature
0.0°C
•
Input/Output (Operating Parameters)
Air return humidity
0.0°C
Operating mode
Refrigeration/cooling
•
Setpoint
•
User
•
Maintenance
•
Manufacturer
•
ON/OFF
Input/
Output
Setpoint
Mainten
ance
User
Manufac
turer
na91282-01a
Press the buttons on the Main Interface screen to access the following
functions:
• Alarm
Turning the Unit ON/OFF
Description
Screen
Path: Main Interface > ON/OFF
2019-03-20
16:11
ON
OFF
V1
na91282-03b
U:01
Presss the appropriate button to turn the
unit on or off.
Operating Parameters–IDU Controller
Description
Screen
Path: Main Interface > Input/Output > IDU Controller Operating
Parameters
2019-03-20
16:11
ODU Controller
Operating
Parameters
Historical Data
Historical
Alarms
This screen provides information about the A01–EC fan and the IDU
expansion valve steps.
na91282-05a
IDU Controller
Operating
Parameters
2019-03-20
16:11
A01-EC fan
IDU expansion valve steps
0.0 V
0
na91282-43b
I1
990-6280-001
59
3.5-kW DX Split Air Conditioning Unit
Operation
Operating Parameters–IDU Controller
Description
2019-03-20
16:11
Digital input
Fire alarm / Remote ON/OFF
High level switch of pump
Water on the floor
ON
ON
ON
I2
na91282-44a
Digital input:
ON-No alarm
OFF-Alarm
Screen
Temperature and humidity parameters
2019-03-20
16:11
°C
°C
°C
°C
I3
na91282-45a
Air out temperature
Coil Inlet temperature
Coil outlet temperature
Air return temperature
Air return humidity
Parameters for alarms, pump, heater, fan, and low temperature kit
2019-03-20
16:11
ON
ON
ON
ON
ON
ON
I4
na91282-46a
Digital input
Serious alarm
Common alarm
Condensation pump
PTC heater
IDU fan
SV of low temperature kit
Fan and compressor run time
2019-03-20
16:11
Main fan
#1 Compressor runtimes
0.0 h
0.0 h
na91282-47a
I5
60
990-6280-001
Operation
3.5-kW DX Split Air Conditioning Unit
Operating Parameters–ODU Controller
Description
Screen
Path: Main Interface > Input/Output > ODU Controller Operating
Parameters
2019-03-20
16:11
ODU Controller
Operating
Parameters
IDU Controller
Operating
Parameters
na91282-05a
Historical
Alarms
Historical Data
Temperature parameters
2019-03-20
16:11
0 Hz
0.0°C
Suction temperature
Exhaust temperature
System low pressure
System high pressure
0.0°C
0.0°C
0.0 Bar
0.0 Bar
A10
na91282-16b
#1 ODU parameter
Operation frequency
Ambient temperature
Operating Parameters–Historical Data
Description
Screen
Path: Main Interface > Input/Output > Historical Data
2019-03-20
16:11
ODU Controller
Operating
Parameters
Historical
Alarms
Historical Data
Historical Humidity Data
na91282-05a
IDU Controller
Operating
Parameters
Historical Data
100
75
50
0
9:28
2019-03-20
990-6280-001
9:40
2019-03-20
9:52
2019-03-20
10:04
2019-03-20
10:16
2019-03-20
10:28
2019-03-20
na91282-17b
25
61
3.5-kW DX Split Air Conditioning Unit
Operation
Operating Parameters–Historical Alarms
Description
Screen
Path: Main Interface > Input/Output > Historical Alarms
2019-03-20
16:11
Historical Data
Path: Main Interface > Input/Output > Historical Alarms > Alarm
Press and hold Clear Alarm to clear alarms.
ODU Controller
Operating
Parameters
Historical
Alarms
na91282-05a
IDU Controller
Operating
Parameters
Historical Alarm
Date
Alarm Message
na91282-02b
Time
Setpoint
Description
Screen
Path: Main Interface > Setpoint
The password for the Setpoint screen is 1000.
62
Default
Air return temperature
35°C
Air outlet temperature
22°C
Minimum humidity
15°C
Maximum humidity
80°C
Air return temp.:
35°C
Air outlet temp.:
22°C
Minimum humidity:
15°C
Maximum humidity:
80°C
na91282-18b
Item
2019-03-20
16:11
990-6280-001
Operation
3.5-kW DX Split Air Conditioning Unit
User
Description
Screen
Path: Main > User > User Password
The default user password is 1000.
Password error displays if a wrong password is entered.
Enter the password within 5 seconds after the password error.
Please enter your password
****
Confirm
Cancel
na91282-19a
Password error.
2019-03-20
16:11
Item
Default
Option
Language
English
YES
YES
UNIT OFF
Chinese
English
PTC Heater
YES
NO
Condensation pump alarm
Condensation pump
NO
YES
Condensation pump alarm
UNIT OFF
ALARM
P1
na91282-20b
Language
PTC Heater
Condensation pump
2019-03-20
16:11
Item
Default
Range
Air outlet temperature limit
Air outlet temperature limit
Maximum
27°C
0–35°C
Minimum
13°C
0–20°C
Minimum
Maximum
42°C
0–50°C
Minimum
16°C
0–35°C
Air return temperature limit
990-6280-001
27°C
13°C
16°C
P2
42°C
na91282-21b
Maximum
Minimum
Air return temperature limit
Maximum
63
3.5-kW DX Split Air Conditioning Unit
Operation
User
Description
Screen
2019-03-20
16:11
Default
Range
Air outlet temperature limit
High temperature
45°C
0–50°C
Low humidity
15%
0–95%
High humidity
95%
0–100%
Low temperature
8°C
0–13°C
High temperature
32°C
0–25°C
Return humidity alarm
Air return temperature alarm
High temperature
Return humidity alarm
45°C
Low humidity
High humidity
Air outlet temperature alarm
Low temperature
High temperature
P3
15%
95%
8°C
32°C
na91282-22b
Item
Air outlet temperature alarm
2019-03-20
16:11
Default
Range
BMS control
YES
NO
Modbus address
0
0–255
Communication speed
9600
4800/9600/19200
New user password
1000
0–65535
BMS control
Modbus address
Comunication speed
YES
0
9600
New user password
0
Date
Time
P4
Touch Screen
Sound
ON/OFF
na91282-23b
Item
Press Date Time to show the date and time.
Press Touch Screen Sound to turn the sound on or off.
Maintenance
Description
Screen
Path: Main > Maintenance
2019-03-20
16:11
IDU board version: SE_IDC_EN1.3
ODU board version: SE_ODC_EN1.3
HMI version: SE_HMIC_EN 1.3
Touch Screen
Sound ON/OFF
Alarm Sound
ON/OFF
Restart Touch
Screen
F1
Range
Outlet temperature for unit off
19°C
14–24°C
Select YES for manual operation.
Select Manual and ON from the drop-down lists.
64
na91282-28b
Default
19°C
SE_IDC_EN 1.3
SE_ODC_EN 1.3
SE_HMIC_EN 1.3
2019-03-20
16:11
Manual operation
Serious alarm
Common alarm
Auto
Auto
NO
OFF
OFF
Condensation pump
PTC heater
IDU fan
SV low temperature kit
Auto
Auto
Auto
Auto
OFF
OFF
OFF
OFF
F2
na91282-48a
Item
Outlet temperature off
IDU board version
ODU board version
HMI version
990-6280-001
Operation
3.5-kW DX Split Air Conditioning Unit
Maintenance
Description
Screen
IDU maintenance information
2019-03-20
16:11
IDU fan speed
IDU EEV steps
Auto
Auto
0.0V
0
na91282-49a
F3
IDU maintenance information
2019-03-20
16:11
NO
NO
Threshold running hours alarm
IDU fan
0.0 h
F4
na91282-50a
Modify run hours
IDU fan hours reset
#1 Compressor hours reset
IDU maintenance information for temperature and humidity
2019-03-20
16:11
0.0°C
0.0°C
Coil outlet temperature
Air return temperature
Air return humidity
0.0°C
0.0°C
0.0%
F5
na91282-51a
Probe setting
Air outlet temperature
Coil inlet temperature
Press the appropriate buttons to clear and download alarm or date.
2019-03-20
16:11
New maintenance password
0
Clear
History
Alarm
990-6280-001
Clear
History
Date
Download
Alarm to
U Disk
Download
Date to
U Disk
na91282-52a
F6
65
3.5-kW DX Split Air Conditioning Unit
Operation
Manufacturer
Description
Screen
Path: Main > Manufacturer
Enter a new manufacturer password.
2019-03-20
16:11
Configuration
Management
Parameters
NO
0
na91282-53a
Default value
New manufacturer password
Timing
Path: Main > Manufacturer > Configuration Management
2019-03-20
16:11
Default
Option
BMS Network
Standard
Custom
DI1 Function selection
Fire/Smoke
Remote
Condensation pump alarm
NO
YES
Water on floor
NO
YES
Maintenance alarm
YES
NO
BMS Network
DI1 Function selection
Condensation pump alarm
Standard
Fire/Smoke
NO
Water on floor
NO
Maintenance alarm
YES
na91282-54a
Item
Path: Main > Manufacturer > Parameters
2019-03-20
16:11
Item
Default
Maximum speed of EC/DC fan
8*
Maximum speed of EC/DC fan
8*
Failure speed of EC/DC fan
8*
Dehumidifying speed of EC/DC fan
5
Maximum speed of EC/DC fan
Minimum speed of EC/DC fan
Failure speed of EC/DC fan
0.0 V
0.0 V
0.0 V
na91282-55a
Dehumidifying speed EC/DC fan 0.0 V
*Default is 8 for stacked unit; default is 10 for standard unit.
Path: Main > Manufacturer > Timing
2019-03-20
16:11
Default
Delay time to stop fan
5 seconds
Delay alarm low/high temperature
30 seconds
Delay alarm condensation pump
5 seconds
Delay alarm output
10 seconds
Delay time to stop fan
5 seconds
Delay alarm low/high temperature 30 seconds
Delay alarm condensation pump 5 seconds
Delay alarm output
66
10 seconds
na91282-56a
Item
990-6280-001
Maintenance
3.5-kW DX Split Air Conditioning Unit
Maintenance
Preventive Maintenance
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
•
Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices.
•
This equipment must be installed and serviced by qualified and trained
personnel only.
•
Turn off all power supplying this equipment before working on or inside the
equipment.
•
Replace all devices, doors, and covers before turning on power to this
equipment.
Failure to follow these instructions will result in death or serious injury.
WARNING
HAZARD TO EQUIPMENT OR PERSONNEL
All work must be performed by Schneider Electric qualified and trained personnel.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
Perform the following maintenance check list.
Prepared By: ________________________________
Model Number: ______________________________
Serial Number: ______________________________
Date: ______________________________________
990-6280-001
67
3.5-kW DX Split Air Conditioning Unit
Maintenance
Electrical Maintenance
Perform visual inspection and processing of electrical connections.
Perform a total electrical insulation test. Find the non-conforming contacts
for processing. Disconnect the control switch or air switch during the test to
avoid any damage to the control device from high voltage.
Statically detect whether each contactor is pulled in flexibly without
jamming.
Remove dust from the electrical and control components with a brush or
dry compressed air.
Check for arcing or burn marks on the contacts. Replace the contactor if
necessary.
Fasten each electrical connection terminal.
Check whether the quick connector is in good contact and replace the
terminal if necessary.
Check the appearance of the adapter and test its output voltage for the
indoor and outdoor units.
Check the output connection from the control interface board to each
contactor and the input connection of the high and low voltage switches,
and filter plug switch. Replace the plug terminal immediately if it is loose or
has bad contacts.
Replace the control fuse (or air switch), control board, and other electrical
components if necessary.
68
990-6280-001
Maintenance
3.5-kW DX Split Air Conditioning Unit
Control Maintenance
Perform visual inspection and simple function testing of the control segment for
processing.
Check for obvious aging on the surface of the control interface board and
the display control board.
Remove the dust and dirt on the control components and control boards
with a brush and an electronic dedusting agent.
Check and fasten the I/O plug interface of the control interface board,
including the connection between the display control board and the control
interface board and the connection between the control interface board and
the temperature and humidity sensor board.
Check the specifications and aging of the control wire and the power wire
and replace if necessary.
Check and calibrate the readings of the temperature and humidity sensor
with an instrument of high measuring accuracy. Select relative humidity
control as the humidity control mode.
Clean the air filter net. Place on a hard surface and gently tap to remove
heavy particles. If necessary, wash the filter with a neutral detergent in
warm water and dry it before re-installation.
Use a vacuum cleaner and a nylon brush to clean the dust and other debris
on the surface of the heat exchanger. If a compressed air source is
available, use the compressor to spray the dust off the surface.
Regularly check the motor, impeller, and other components of the fan. If
necessary, consult the manufacturer for more details.
Before operating the unit, ensure the drainage pipe is not blocked.
990-6280-001
69
Worldwide Customer Support
Customer support for this or any other product is available at no charge in any of the
following ways:
•
Visit the Schneider Electric Web site to access documents in the Schneider
Electric Knowledge Base and to submit customer support requests.
- www.schneider-electric.com (Corporate Headquarters)
Connect to localized Schneider Electric Web sites for specific countries, each of
which provides customer support information.
- www.schneider-electric.com/support/
Global support searching Schneider Electric Knowledge Base and using esupport.
•
Contact the Schneider Electric Customer Support Center by telephone or e-mail.
Local, country-specific centers: go to www.schneider-electric.com/support/
contactwww.schneider-electric.com > Support > Operations around the
world for contact information.
For information on how to obtain local customer support, contact the representative or
other distributors from whom you purchased your product.
Printed in:
Schneider Electric
Schneider Electric
35 rue Joseph Monier
92500 Rueil Malmaison
France
+ 33 (0) 1 41 29 70 00
www.schneider-electric.com
As standards, specifications, and design change from time to time,
please ask for confirmation of the information given in this publication.
© 2019 – 2019 Schneider Electric. All rights reserved.
990-6280-001

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